Are you trying to access through the Java client?
If so, it says your banned because that channel is deactivated and the Java client hasn't updated to make you join asia.toribash.com instead of irc.quakenet.org.
When you join it, type /server asia.toribash.com
EDIT: Samule got there first... Still unless you have any problem with any ports, typing "/server asia.toribash.com 6667" just talkes you more time than "/server asia.toribash.com". Also it joins through 6667 automatically.